of chicago



H. A. DE VRY FILM .SPQQL Oriizirial Filed Sept. 4. 192a Reissue! a. 4, 1927.

UNITED-"STATES PATENT" oar-ice.

HERMAN A. DE VBY, OF CHICAGO, ILLINOIS, ASSIGNOB TO THEJDE TRY COBPOIBA- T1011, 01' CHICAGO, ILLINOIS, A CORPORATION OF ILLDTOIS.

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Drlglnal no. 1,eao,aos,

invention relates to reels or spools for The object of the invention is to griovide an impi'oved film reel or spool w c h is I 6 adapted for use as either a drive or idler v spool. on either a polygonal or cylindrical provided with either cylindrical or polyg y onal drive shafts, when used asa take-up spool, as well as being adaptedto run idly around stationary shafts when the spool s used as a supply-reel spool.

The invention consists in theseveral novel features hereinafter setforth and more par- 'ticularly defined bv claims at the conclusion hereof.

In the drawings: Fig. 1 1s 'a vertical transverse section of the improved film reel mounted on a cylindrical drive shaft having a single key for use as a take-up spool. Flg. 2 is a side' elevation of the. spoo with the shaft in section. 2" is a side elevation of the spoolon a shaft with four keys. Fig. 3 is avertical section of: the improved film reel mounted on a cylindrical shaft for use as a=supply spool. Fig. 3" is a detall of the cylindrlcal shaft and the ooeninoin said spool. Fig. 4 is a, vertical sectlonof the invention mounted upon a square'drive shaft used for-a take-up spool. Fig.5 is 'a' side elevation of the spool on the square shaft. Fig. 6 is a detail perspective of the opening in one of the reel-sides for receiving the reduced end of a shaft. Fig. 7 is a vlewslmllar to Fig. 6 of the opening on the opposite side for receifz'ing either a polygonalor cylindricalsha. 3 o I exemplified in a film The invent on 1s reel or spool which is formed of sheet metal and comprises circular sides-11 and 12' and an annular hub portion 10 t o which the end of a film may be secured by a cl p of the usual construction, as well understood 1n' the art, and around which a filmwillbe, wound.

Hub-10 is I I v p rality of -1ntegral tongues 10. wh ch are provided at its ends with a plu dated larch 8, 1927, flerlal No. 138,536, llled September 4,1926. Application 10: reissue filed August 28, 1927. Serial No. 215,747.

adapted to extend through arcuate slots formed in the sides 11 and 12 respectively. Tongues 1 10fare upset at their outer ends against the outer surface of the sides 11 and 11l2,bso as to Ilsecurely join the latter to the Side 11 is-provided at its center with a circular opening 11 which is punched therein and is adapted to fit around and engage the circular end either of a drive or a stationary shaft, which-may be reduced if detsired, as shown in 'Figs. .1, 3 and 4. I

Spool-side 12 is provided at its center with an opening 12 which has four radial or concave notches 12 which are spaced 90 apart, each conforming in shape substantially to the cross-section'of and adapted to fit around a key '14 (Fig. 2) on a cylindrical drive shaft 15.. The four notches also adapt the spool to fit around and be driven by a shaft 15' having any number of keys up to four as shown in Fig. 2, and also adapt the spool-side to pass around a square drive-- shaft 16, as shown in Fig. 5, the angular corners of the shaft entering the notches 12. Between the notches 12 the several portions of the margin of the opening 12 are each cut to form convex intermediate bearing-portions 12. The minimum diameter of the opening 12 is between the crowns of the portions 12 between the notches 12. This minimum diameter corresponds sub stantially to the diameter of the c lindrical portion of a shaft 15 with a sing e key.14,

as shown in Figs. 1 and 2, or the cylindrical portion of shaft 15'with four keys and also corresponds to the minimum diameter 'ofja square shaft 16, as shown in 4-. ar 9 and 5. Therefore, these crowns will on and properly support one end of the s 001 and form a driving connection with al of said shapes of drive shafts, as well as. bear on theperiphery of a stationary shaft '17 when the spool is used as .an idle or supply-spool and is not driven. convex crowns of the portions 12 form These what maybe designated point contacts to make it possible to attain a reasonably ac- .curate fit between the medial points in the sides orat the shortestdiameter of a square shaft. As aiesult, this construction exemshaft 17 which is usually of the ameter as the drive-shafts.

When the spool is placed on a cylindrical drive shaft 15, as shown in Fig. 1, the crowns or portions 12 will fit around the cylindrical portion of the periphery of the shaftand the key 14 will fit in one of the notches 12 so as to form a driving connection between the spool and the shaft to drive the reel. By having four notches 12 the reel may 'be connected at points 90 apart and thus eliminate waste of the film when the film is being secured to the hub 10 and the spool also may be placed on and driven by a similar shaft with four, three or two keys 14. When the spool is mounted on a square or polygonal drive shaft 15, the shortest diameter of which is the same as the diameter of cylindrical shaft 15, the corners. of the shaft 16 will enter the notches 12 (Fig. 4), and the pointers or crowns of the portions 12 will snugly fit the medial points of the sides of the shaft respectively, the wider portions of the shaft engaging the convex sides of said portions thus forming a drive connection between the shaft 16 and thereel. When the spool is mounted on a stationary cylindrical shaft 17 (Fig. 3), the crowns of the portions 12 will fit around the shaft and form a hearing which ermits the spool to run idly around the shaft 17.

By reason of the engagement or contact between the crowns 12", the spool will be directly centered on the axis of these different shafts as well as drivably connected with them.

The invention exemplifies an improved film spool or reel which may be used as a take-up spool on either a cylindrical or polygonal drive shaft, as found in different cameras, or as an idler spool on a stationary cylindrical shaft.

The invention is not to be understood as restricted to the details set forth, since these may be modified within the scope of the ap' pended claims, without departing from the spirit and scope of the invention.

. Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is:

1. A film spool comprising a hub and sides, each of the sides being provided with a shaft opening, one of the openings havingv a plurality of outwardly extending notches to receive a key on a cylindrical shaft of a predetermined size and shaped to receive the corners of a polygonal shaft of a predetermined size, the margins of the opening of the reel on, either a polygonal shaft or a between the notches being shaped to fit either the sides of a polygonal or the periphery of the cylindrical shaft with a key, and where by the spool will be adapted to be drivenby either of such shafts and to rotate on a plain cylindrical shaft.

2. A film spool comprising a hub and sides, each of the sides being provided with a shaft opening, one of the openings having a plurality of outwardly extending notches to receive a key on a cylindrical shaft of a predetermined sizeand shaped to receive the corners of a polygonal shaft of a predetermined size, the margins of the opening between the notches'being inwardly crowned to fit either the central portions of the sides of a polygonal or the periphery of the cylindrical shaft with a key, and whereby the spool will be adapted to be driven by either of such shafts and to rotate on a plain cylin-i drical shaft.

- 3. A film spool comprising a hub and sides,-one of the sides having a circular opening to receive the circular end of a shaft, and the other with an opening to fit around a cylindrical shaft of a. predetermined size and ,aplurality of outwardly extending notches shaped to receive the key on the cylindrical shaft or the corners of a polygonal shaft of predetermined size, to form driving connections with either of such shafts and to rotate on a plain cylindrical shaft.

4. A film spool comprising a hub and sides, .one of the sides having a circular opening to receive the circular end of a shaft, and the other with an opening having a plurality of outwardly extending notches shaped to receive'the key on a cylindrical shaft or the corners of a polygonal shaft of predetermined size, and inwardly crowned margins between the notches to fit the central portions of the sides of a polygonal shaft or the periphery of a cylindrical shaft 6. A reel for photographic films provided with an opening therein having a portion at one side shaped to removably' and drivably fit and to center the reel on, either a polygonal shaft or a circular shaft with a pro jecting key,1and with a circular portion to center the other side on a circular prolongation of either of said shafts 7. A reel for photographic films comprising two axially spaced side plates, one of which is provi ed with an opening to removably and drivably fit, and to center one side circular shaft with a projecting key thereon,

and its other plate provided with an openof the reel on, either a polygonal shaft or a. ing shaped to center the other side of the circular shaft with a projecting key thereon, reel on a portion of the shaft. and its other plate provided with e substan- 1 8. A reel for photographic films compristially circular opening to fit a circular por- 5 ing two axially spaced side plates, one of tion of the shaft.

which is provided with an opening'to removably and drivably fit, and to center one side HERMAN-A DE VRY. 

